问题 单项选择题

关于经空气传播的传染病,下列说法正确的是()。

A.常有季节性特点

B.常有周期性特点

C.易暴发

D.儿童发病多见

E.以上全对

答案

参考答案:E

解析:经空气传播的疾病其传播机制易于实现,多周期性、季节性,儿童发病多见,与儿童的抵抗力较低有直接关系。疾病的流行强度往往与人们的居住条件、人口密度、人群中易感人口所占的比例及卫生条件等因素密切相关。

阅读理解

Silence is unnatural to man.He begins life with a cry and ends it in stillness.In between he does all he can to make a noise in the world, and he fears silence more than anything else.Even his conversation is an attempt to prevent a fearful silence.If he is introduced to another person, and a number of pauses occur in the conversation, he regards himself as a failure, a worthless person, and is full of envy of the emptiest headed chatterbox(喋喋不休的人).He knows that ninety-nine percent of human conversation means no more than the buzzing of a fly, but he is anxious to join in the buzz and to prove that he is a man and not a waxwork figure(蜡塑人像).

The aim of conversation is not, for the most part, to communicate ideas; it is to keep up the buzzing sound. There are, it must be admitted, different qualities of buzz; there is even a buzz that is as annoying as the continuous noise made by a mosquito (蚊子).But at a dinner party one would rather be a mosquito than a quiet person. Most buzzing, fortunately, is pleasant to the ear, and some of it is pleasant even to the mind. He would be a foolish man if he waited until he had a wise thought to take part in the buzzing -with his neighbors.

Those who hate to pick up the weather as a conversational opening seem to me not to know the reason why human beings wish to talk. Very few human beings join in a conversation in the hope of learning anything new. Some of them are content if they are merely allowed to go on making a noise into other people's ears, though they have nothing to tell them except that they have seen two or three new plays or that they had food in a Swiss hotel. At the end of an evening during which they have said nothing meaningful for a long time, they just prove themselves to be successful conservationists.

小题1:According to the passage, people usually talk to their neighbors_____.

A.in the hope of learning something new

B.in the hope of getting on well

C.about whatever they want to

D.about whatever they have prepared小题2:According to the author, people make conversation to______.

A.achieve success in life

B.overcome their fear of silence

C.exchange ideas

D.prove their value小题3:What is the author's purpose in writing the passage?

A.To persuade people to stop making noises.

B.To explain why people keep talking.

C.To discuss why people like talking about weather.

D.To encourage people to join in conversations.小题4:By "the buzzing of a fly"(Para.1), the author means"_____".

A.the voice of a chatterbox

B.meaningless talk sound

C.a low whispering

D.the noise of an insect

问答题 简答题